So here's my story. I work from home and currently use a laptop with 2 external monitors. I've been a laptop guy for years because I like the portability. So I was dead set on buying a new Alienware M18XR2. Added everything up I wanted and was looking at like $3300 with dual 680m's. The work programs I run aren't anything taxing at all, I just use a lot of programs so I need the screen real estate. So now I'm thinking of buying an Alienware for like $2k and building a PC for about $1k. I'm more of a console gamer, but I play occasional PC games. I will be playing the new SimCity. and BF3 for sure. I will also be doing some HD video editing in Cyberlink Powerstudio and Sony Vegas Pro. Nothing huge there, just home movies. I've got the OS, mouse, keyboard ect.
A big key is I play to eventually have 3 monitors running with this setup. I have 2 now, but they are cheap and one is a 22" and one a 24". So the plan is to sell those and get 3 nice 24" with at least one being 120hz. So with that said, I will be adding a 2nd card in SLI and want to make sure that with this build I am setting myself up to be able to just add the 2nd card in. So if I need to spend an extra $20 on the power supply now to make sure I don't have to get one when I add the 2nd card in 6 months no problem. Let me know what you think about what I put together, I'm sure there are areas you guys can improve upon. Thanks!
But you also have to take into account they are using a higher-draw i7-965 extreme overclocked and have to assume a person would be using a low-quality 750W with not as much +12V rail amperage as such a unit should have, so they are very conservative with this number. Where you have a high-quality 750W PSU and a much lower-power CPU I'm confident you are more than safe in that department.